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Once you have logged into the Group Access Manager online interface, you must choose the group you would like to manage.
To see all groups you manage, click on Manage my SGs
You will then be presented with a list of groups for which you are listed as a manager, as well as several options along the top of the screen.
To add a member to a group or groups you manage, click the check box next to the name of the group(s) you would like to modify, and then click on the Add Member icon above. 
A new window will pop up, with an empty box to add members above, and below a semi-colon separated list of groups the people will be added to. Enter the names or netids of the people you would like to add to the group, separated by a semicolon.
If you are entering a full name, enter it in the format of Firstname Lastname (ex: John Doe). For more information on what will work for a name, and what won't, please review these rules.
Please be aware that you cannot add a group to a group or groups. The FIM Portal will not allow this. If you need a large number of people added to a group, please contact the Identity and Access Management Group
Once you have entered your names or netids, click on the small green check mark icon to the right. This will double check the information you entered, and, if correct, return their full underlined names (verifying that they are correct).
You will see a summary of your changes. If they are correct, click on Submit. If you need to make changes, click on *Back *and make corrections. 
If you would like to verify your changes, click on the name of the group, and verify your updates on the members tab.
Please note that it can take up to two hours before your changes take effect.